Why do some people have heart palpitations?

Awareness. the specific definition of palpitations is feeling your heart beat - which in general is good :-) it can range from feeling the pulse when in a quiet room - to actual abnormal beats - extra beats from a sensitive spot - to extra circuits conducting beats, or the top part of the heart going out of rhythm and beating chaotically - depends on what is going on as to the cause.

Related Questions

Are heart palpitations inherited?

Can be. Palpitations represent various rhythm problems, some of which can run in families. Read more...
Abnormal rhythms may. Palpitations are sensations that there is some abnormality in the heartbeat. They are subjective. Certain heart rhythm problems have genetic causes. Some may be benign and others life threatening. It is best to record the heartbeat at the time of symptoms and get a baseline ECG for evaluation. Read more...